Apparatus for the manufacture of mica plates



Qu. 4,v 1927. 1 .BORER APPARATUS FOR THE MANUFACTURE OF MICA PLATES v Filed April 19. 192s.- 2 engem-Sheet 1 oct. 4 1921; 1644631 J. BORER APPARATUS FOR THE MANUFACTRE MICA PLATES Filed April 19. V192; '2 sheetssheet 2 Patented Oct. 4, 1927.

Unir-estara air Er or Fi es.;

APPAEATS Eon THE MANUEAGTURE 0E MICA PLATES.

Application flied April 19,

This invention relates to apparatus for the manufacture of plates from mica flakes by sucking them on to a perforated plate and then releasing the mica layer therefrom.

This apparatus is characterized by the suction trunk combined with the suction plate being so divided by partitions into individual suction compartments or suction chan nels, that the suction action is uniformly distributed over the whole area ofy the suction plate. In this way the advantage is obtained of a uniform layer of mica on the suction plate, since all parts thereof are submitted to approximately the same suction action. v

An embodiment of the apparatus is illustrated in the accompanying drawings7 in which:

Fig. l is a vertical section thereof, and

Fig. 2 a partial horizontal section on line A -B of Fig. 1.

Fig. 3 shows a detail on a larger scale.

rlhe trunk @broadening at the top to suit the form ofthe plate is connected at the lower end with a pressure air blower 0. Above this is a sieve on which the mica flakes rest when the blower is at rest.' In the upper part of the trunk a is a perforated suction plate 7c. A door Z below this servesv for charging the trunk a.

In the upper part of the trunk a, below the suction plate la, a take-olf plate 7L is movably arranged on two rails g. The run-in plate z can be lifted up against the perforated suction plate f: by suitable swinging levers r. The plate z serves to take off the layer of mica adhering to the suction plate 7e and remove it for further treatment. The opening in the trunk through which the take-off plate 7L passes, can be closed by a valve z'.

Above the suction plate rises a suc-tion trunk s at the upper end of which is located a suction fan t. The suction trunk s is divided into compartments by division walls or partitions u, as can be seen in Fig. 2, so that a series of adjacent suction channels v are formed, by which means the suction action is uniformly distributed over the suction plate 7c.V

The manufacture of plates from mica with this apparatus proceeds as follows:

The devices c and t are set in action and approximately the necessary quantity of mica for one suction thrown into the trunk a. The mica flakes are raised, whirled and separated by the pressure Vair in the lower 1926. Serial N0..l03,145'.

part of the trunkv u and are brought into the reach of the suction air, and drawnk thereby `against the perforated suction` plate c After a sufficient quantity of mica flakes adheres to the lower side of the suction plate lo, the pressure air is stopped, the take-off plate 7L is run into the trunk and pressed lagainst the plate lc with the mica layer ad hering to it. The suction air is cut off and the take-off pla-te lowered. It takes with it the mica flakes on the plate c, and they re main lying on the plate h. The mica flakes are then sprayed with adhesive in the known manner. i

`During the running out of the take-ofi' plate h a ro-ller brush w connected therewithv brushes the lower side of the suctionV plate 7c, thus cleaning it and leaving it clear for the next operation. When the takeoff plate h is moved out of the trunk a, the carrier 'w1 (Fig. 3) carrying the brush w strikes finally against a fixedstop so that on continuation of said outward movement, a gripping coupling 1/ between the carrier w1 and the take-off plate h is disengaged to allow the carrier w1 with the brush to' run backward to the right positon under the action of a weight a connected by a cable to said carrier. When the take-off plate 7L is reintroduced into the trunk a, the said coupling y becomes closed again for .subsequent trailing of the brush. V

What I claim is 1.' An apparatus for the manufacture 0f mica plates,l comprising in combination a mica supplied trunk, means at its lower end to keep mica flakes in suspension therein, a perforated suction plate at the top of said trunk, a suction'trunk arranged above said suction plate, partitions within saidl suction trunk to subdivide it into a number of adjacent suction channels uniformly distributed over the suction plate. a suction de-y trunk tosubdivide it into :L number of adjacent suction channels uniformly distributed over the suction plate, a Vsuction fun mounted `at the upper end of the suction trunk, and a movable take-01T plate capable of being shifted'below the suction plate and pressed against it to take off the mica, layer therefrom, u cleaner being connected to said movable take-off plate to Clean the suction side of the suction plate.

my naine this V8th day of April 1926.

` JOSEF BORER.

In Witness whereof I have hereunto signed Y i 

